Earth
Our home world — the only known planet with liquid water on its surface and life.
See Earth in the 3D solar system →Earth at a glance
- Distance from Sun
- 1 AU
- Radius
- 6,371 km
- Day length
- 24 hours
- Year
- 365 days
- Moons
- 1
- Mean temperature
- 15 °C
- Surface gravity
- 9.81 m/s²
- Mass
- 1 × Earth
About Earth
Earth is the third planet from the Sun and the only place known to support life. Around 71% of its surface is covered by liquid water, and a protective atmosphere of nitrogen and oxygen shields the surface and keeps temperatures mild.
Earth has one large natural satellite, the Moon, whose gravity drives the tides and helps stabilise the planet's tilt — and with it, the seasons.
- The only known planet with life
- Surface is ~71% liquid water
- Has one large moon